<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Form
 * @subpackage Decorator
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */

/** Zend_Form_Decorator_Abstract */
require_once 'Zend/Form/Decorator/Abstract.php';

/** Zend_Form_Decorator_Marker_File_Interface */
require_once 'Zend/Form/Decorator/Marker/File/Interface.php';

/** Zend_File_Transfer_Adapter_Http */
require_once 'Zend/File/Transfer/Adapter/Http.php';

/**
 * Zend_Form_Decorator_File
 *
 * Fixes the rendering for all subform and multi file elements
 *
 * @category   Zend
 * @package    Zend_Form
 * @subpackage Decorator
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: File.php 16971 2009-07-22 18:05:45Z mikaelkael $
 */
class Zend_Form_Decorator_File
extends Zend_Form_Decorator_Abstract
implements Zend_Form_Decorator_Marker_File_Interface
{
	/**
	 * Attributes that should not be passed to helper
	 * @var array
	 */
	protected $_attribBlacklist = array('helper', 'placement', 'separator', 'value');

	/**
	 * Default placement: append
	 * @var string
	 */
	protected $_placement = 'APPEND';

	/**
	 * Get attributes to pass to file helper
	 *
	 * @return array
	 */
	public function getAttribs()
	{
		$attribs   = $this->getOptions();

		if (null !== ($element = $this->getElement())) {
			$attribs = array_merge($attribs, $element->getAttribs());
		}

		foreach ($this->_attribBlacklist as $key) {
			if (array_key_exists($key, $attribs)) {
				unset($attribs[$key]);
			}
		}

		return $attribs;
	}

	/**
	 * Render a form file
	 *
	 * @param  string $content
	 * @return string
	 */
	public function render($content)
	{
		$element = $this->getElement();
		if (!$element instanceof Zend_Form_Element) {
			return $content;
		}

		$view = $element->getView();
		if (!$view instanceof Zend_View_Interface) {
			return $content;
		}

		$name      = $element->getName();
		$attribs   = $this->getAttribs();
		if (!array_key_exists('id', $attribs)) {
			$attribs['id'] = $name;
		}

		$separator = $this->getSeparator();
		$placement = $this->getPlacement();
		$markup    = array();
		$size      = $element->getMaxFileSize();
		if ($size > 0) {
			$element->setMaxFileSize(0);
			$markup[] = $view->formHidden('MAX_FILE_SIZE', $size);
		}

		if (Zend_File_Transfer_Adapter_Http::isApcAvailable()) {
			$markup[] = $view->formHidden('APC_UPLOAD_PROGRESS', uniqid(), array('id' => 'progress_key'));
		} else if (Zend_File_Transfer_Adapter_Http::isUploadProgressAvailable()) {
			$markup[] = $view->formHidden('UPLOAD_IDENTIFIER', uniqid(), array('id' => 'progress_key'));
		}

		if ($element->isArray()) {
			$name .= "[]";
			$count = $element->getMultiFile();
			for ($i = 0; $i < $count; ++$i) {
				$htmlAttribs        = $attribs;
				$htmlAttribs['id'] .= '-' . $i;
				$markup[] = $view->formFile($name, $htmlAttribs);
			}
		} else {
			$markup[] = $view->formFile($name, $attribs);
		}

		$markup = implode($separator, $markup);

		switch ($placement) {
			case self::PREPEND:
				return $markup . $separator . $content;
			case self::APPEND:
			default:
				return $content . $separator . $markup;
		}
	}
}
